Role of Sn in corrosion and passive behavior of extruded Mg-5 wt%Sn alloy
By Ha, Heon-Young; Kang, Jun-Yun; Yang, Jie; Yim, Chang Dong; You, Bong Sun
Published in Corrosion Science
NULL
2016
Abstract
Abstract Corrosion behavior of extruded Mg and Mg5Sn (in wt%) alloy was investigated, and a passivated surface of the Mg5Sn was examined. Immersion test in a 0.6 M NaCl solution revealed that corrosion of the Mg was significantly faster than the Mg5Sn alloy, and vigorous {H2} evolution was accompanied with the severe corrosion of Mg. Polarization tests confirmed that cathodic reaction was inhibited in the Mg5Sn alloy. It was considered that the decreased {H2} evolution of the Mg5Sn alloy was attributed to the formation of Sn-accumulated layer between the passive film and matrix, which was examined by an {XPS} analysis.
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